These unit tests check the correctness of Audacity's effect calculations against GNU octave. Therefore some simple deterministic and random sample data is generated and passed to Audacity via mod-script-pipe.
To run a test, run: (replace <desired_test.m> with the correct filename)
./run_test.m <desired_test.m>
The tests will print the results to the terminal and will return 0 on success and non-zero on error.
To run those tests you need a Linux system with GNU Octave, octave-forge-signal and Audacity mod-script-pipe installed.